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13076a29d5
Seeing how there are 5 copies of this magic code, one of which is unexplainably different, unify and document things. Suggested-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Tested-by: Greg Ungerer <gerg@linux-m68k.org> Link: https://lore.kernel.org/r/20200131125403.597688427@infradead.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
111 lines
2.2 KiB
C
111 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _MOTOROLA_PGALLOC_H
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#define _MOTOROLA_PGALLOC_H
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#include <asm/tlb.h>
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#include <asm/tlbflush.h>
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extern void mmu_page_ctor(void *page);
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extern void mmu_page_dtor(void *page);
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extern pmd_t *get_pointer_table(void);
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extern int free_pointer_table(pmd_t *);
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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pte_t *pte;
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pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
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if (pte)
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mmu_page_ctor(pte);
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return pte;
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}
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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mmu_page_dtor(pte);
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free_page((unsigned long) pte);
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}
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static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
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{
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struct page *page;
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page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
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if(!page)
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return NULL;
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if (!pgtable_pte_page_ctor(page)) {
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__free_page(page);
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return NULL;
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}
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mmu_page_ctor(kmap(page));
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kunmap(page);
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return page;
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}
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static inline void pte_free(struct mm_struct *mm, pgtable_t page)
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{
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pgtable_pte_page_dtor(page);
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mmu_page_dtor(kmap(page));
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kunmap(page);
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__free_page(page);
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}
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
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unsigned long address)
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{
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pgtable_pte_page_dtor(page);
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mmu_page_dtor(kmap(page));
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kunmap(page);
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__free_page(page);
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}
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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return get_pointer_table();
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}
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static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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return free_pointer_table(pmd);
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}
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static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
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unsigned long address)
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{
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return free_pointer_table(pmd);
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}
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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pmd_free(mm, (pmd_t *)pgd);
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}
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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return (pgd_t *)get_pointer_table();
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}
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
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{
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pmd_set(pmd, pte);
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
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{
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pmd_set(pmd, page_address(page));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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pud_set(pud, pmd);
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}
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#endif /* _MOTOROLA_PGALLOC_H */
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